How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

So let's divide the day into quarters . What is , what is the proper way to interact with light in the first part of the day ? So I honestly think the easiest thing is waking up , get as much light as you can into your eyes .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

Ok . So get bright light of some sort early in the day . Ideally , sunlight , even on a cloudy day , it's going to be brighter than indoor light .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

So get bright light of some sort early in the day . Ideally , sunlight , even on a cloudy day , it's going to be brighter than indoor light . That's easy .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

So what do you do ? You turn on artificial lights ? I usually don't turn on artificial light because I know the sun is going to come up eventually .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

You could ask any photographer a cloudy day unless it's really dark , dark clouds , usually cloudy days have much more bright outside than inside the room , even when you have good lighting inside the room . So I think in the outside is usually , even when it's cloudy , you're going to get enough intensity to help you adjust your cycle to the day , night cycle . So how , how long do you , these are general rules of thumb ?